64373472 has 72 divisors (see below), whose sum is σ = 185336424. Its totient is φ = 21191424.

The previous prime is 64373471. The next prime is 64373479. The reversal of 64373472 is 27437346.

It is a happy number.

64373472 is a `hidden beast` number, since 643 + 7 + 3 + 4 + 7 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-3 number, since 3×64373472³ (a number of 24 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64373471) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22558 + ... + 25250.

It is an arithmetic number, because the mean of its divisors is an integer number (2574117).

Almost surely, 2^64373472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64373472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92668212).

64373472 is an abundant number, since it is smaller than the sum of its proper divisors (120962952).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64373472 is a wasteful number, since it uses less digits than its factorization.

64373472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2792 (or 2781 counting only the distinct ones).

The product of its digits is 84672, while the sum is 36.

The square root of 64373472 is about 8023.3080459372. The cubic root of 64373472 is about 400.7765580849.

The spelling of 64373472 in words is "sixty-four million, three hundred seventy-three thousand, four hundred seventy-two".